Milk cooler and aerator



June 17, 1930. R. B. L ATTr-:RELL

MILK COOLER AND AERATOR Filed May '7, 1928 fi i /9 25 in section;

Patented June 17, 1930 UNITED STATES PATENT OFFICE,

RALPH B. LATTERELL, OF KANDIYOHI, MINNESOTA MILK COOLER AND AERATORVplantation mea may 7, 192s. serial N6. 275,772.

This invention relates to milk aerators and wardl projecting flange isprovided at the coolers adapted to draw off the animal heat top o theband. A dome-shaped lid fits from milk fresh from the cows. `over thetop of the band 8, is secured to the It is an object of this inventionto proupwardly and inwardly projecting flange 5 vide a novel andimproved milk aerator thereon and is of slightl greater diameter 55 andcooler which is assembled in a single at its lower-edge than the band 8,so that unit and is adapted to be applied as a unit the outer edges ofthe lid will project beyond to cover the openings in various milk cansthe band 8 and the upper top end vof the of standard construction.` can5, to form eaves for the drainage of 1o To this end, the inventionconsists in the water from thelid to prevent water from 60 novel partsand novel combinations o f parts draining into the can 5 through theopenings hereinafter defined in the claims and de- 9 and from the jointbetween the band 8 and scribed in the following specification, made thetop of the can. A suitable bracket 11 in connect-ion with theaccompanying drawcarrying a water motor is bolted 0r otherings, whereinlike reference characters refer wise fixed to the top of the lid 10. The65 to the same or similar parts lthroughout the water motor comprises asplit casing 12 various views and, in which, within'which a motor shaft13 is journaled Fig. 1 is a view in side elevation of the and a waterwheel 14 is fixed on the shaft device applied to a standard milk canrest- 13 and situated within the casing 12,- A tany ing within a waterreservoir, certain of the gential inlet port 15 is provided in the cas-70 parts being broken away and shown in secing 12 at its upper end andextends vertition; i cally downwardly to lead into the chamber Fig. 2 isa plan view of the device, certain formed in the casing.v A tangentialoutlet of the parts being broken away and shown port 16 is formed at thelower side of the v casing to project outwardly in a horizontal 75 Fig.3 is a vertical section taken through plane from the chamber of thecasing and l the water motor on the line 3-3 of Fig. 2, the two ports 15and`16 are set at approxias is indicated by the arrows, and mately 180oangles from each other relative Fig. 4 is a horizontal section throughthe to the axial center of the shaft 13. The

water motor taken on the line 4 4 of Fig. Vwater Ywheel 14 has a centralhub portion sov 3, as is indicated by the arrows. fixed to shaft 13andradial arms 14a project Referring to the drawings, a cylindricaloutwardly from the hub to alhollow cylinmilk can 5 is illustrated havingan annular drical portion 14b which, in turn, carries a opening at itsupper end and the milk can pluralityof cups 14. The hollow cylindriisshown as resting within a water reservoir Cal portion 14b is of suchwidth as to almost 85 6, partially filled with water and having the abutthe two walls of the split casing 12.

overflow conduit 7 extending from one side Packing glands 17 arethreaded on to outer thereof in spaced relation from the bottom hubs onthe split casing 12through which of the reservoir. In accordance .withthe the shaft 13 extends. A nipple 18 is secured present invention, acap is provided which in the inlet port 15 of the water motor and 90 isadapted to lit on the upper annular open a water supply tube 19,preferably of flexend of a receptacle such as the milk can 5. iblerubber, is secured to the nipple 18 and This cap comprises anannularband 8 adaptis adapted to be attached to any suitable ed to twithin or over the upper annular water supply, such, for example, as awater edge of the can 5 and having a circumferfaucet. A nipple 20 issecured in the outlet ential bead approximately` midway of its port 16and a tube 30 extends from the nipheight adapted to seat against theupper ple 20and through the upper end yof a cylinedge of the can 5. Aplurality of screened drical casing 21 formed at the top centralopenings A9 are formed in the band 8 above portion of the lid 10 above acentral hub 22. the bead thereon and an upwardly and in- The casing 21adjacent its lower edge is pro 100 vided with a plurality of radialholes 23 for dissipation of Water to the top of the lid 10. A verticalpropeller shaft 24 is journaled in the hub 22 and projects down- Wardlytherefrom to adjacent the bottom of the can 5 and carries below the lid10 a helical stirrer 25. A suitable bracket 26, preferably fixed tothebracket 11, carries a split casing'2`7 situated above the centralportion of the lid and in substantially the -Samefver-N tical plane asthe motor shaftl.- 'lheniotor shaft 13 is journaledv at one end Withinthe casing 27 and carries a Worm `28 'Within the casing Which drives aWorm gear 29 secured to the upper. end of thefprbpeller sliaft'2lvvihichprojects 'through and is'journaled vvlithin a hub'inthe lower side/oftheeasing 2.

Itk Will beA observedlthat the Water motor, the propeller shaft'24,the'stirrer' 2,5, the driving mechanism and the" casing 21 are allmounted on the lid which, in turn, is secured to the band 8.Ailthe'mechanism of the present device', therefore, isl assembled ina-.single unit. When it becomes desirable to .aerate and cool milk whichis fresh from a cow, to carry olf the animal heat in the milk and thusprevent themilk fromspoiling, he present device 'is' applied to a milkcan containing the' milk by simply fitting the band 8 into the topopening of the milk can, as illustrated. ,The milkr can 5 willpreferably be placed Within a reservoir 6 containing cool Water, Whichextends for some" little distance upwardly from the bottomA of the can.The tube 1`9` is connected to a suitable cold Water su ply Slnlrljtillustrated) and the Water turned) on. e Water Wheel `14 will now bedriven to rotate the drive shaft i3' to, in' turn, actuate the shaft 24through the Worm28 and Worm' gear'29.

he lhelical stirrer 2'5' vvill thus be rapidly rotated to stir the milk.in the milk can. The Water exhausted from the water motor Will run fromthe exhaust port 16 through the nipple 20 and tube 30Y to the casing 21and lWill be dissipated therefrom through theradial openings '23 totherma'in portion ofthe top surface ,of the lid 10. lThis Water willcool the lid and Will run off the lower edgesthereof into the reservoirG without running into the milk can. The screened openings 9 Willexclude insects and other vermin from the milk canand will yet permitthe admission` and exhaust of air into and out of the milk can. As themilk Will Vbe kept in motion by the stirrer 25 and as the 4top 10 willbe kept quite cool from the ivater 'running over the same, Vand also ascool Watervw'vill be 'preferably held lWithin the reservoir 6, theanimal heat in themilk ywill be quickly driven oi and the `inilk v'villbe cooled and aerated tol prevent pnt-rifactive fermentation takingpla-.Gein the milk. yThe helical .stirrer 25 will act to .carry a,opening of a milk can,

quantity of air into the milk to purify the same. When milk in one canhas been thoroughly cooled and aerated, the present device can bereadily removed as a unit and applied to other cans, to cool and aeratemilk contained therein.

The device is simple and efficient in operation and can be easily andcheaply constructed.v

It'will, of course, be understood that various-changes may be made inthe form, details, arrangement and proportions of the various partsWithout departing from the scope of the present invention.

What is claimed is:

1. Aniaerating and cooling device for milk, assembled in a singleunitand adapted to beI applied to cover the top of: a milk can, saiddevice comprising a cap adapted to fit Within the top of a milk can andhaving portions adapted to overlie the top of the can, a Water motorfixed to said cap, means for exhausting Water after passing through saidmotor on the top of the cap to cool the same, a stirring shaftprojecting lthrouofh said cap and adapted to be placed Within the milkina milk can to4 stir the same, and means for driilingV said shaft from,said Water motor, said cap having Va plurality of a-ir openings situatedbelow the overlying portions thereof, for the admission and exhaust ofair to and from Y`the milkcan..

2; An aerating and cooling device for milk, assembled ina single unitand adapted to be applied to the top of a milk can, said devicecomprisingl an vannular beaded band adapted to be fitted `Within theannular .top

a dome-shaped lid secured to the upper edge of saidfband and adapted tooverlie the top of v propeller shaft journaled in .said lidandprojecting'downvvardly therefrom to be situated Within the milk in thecan, stirring means on said shaft, means secured-to said lid forrotating said shaft, means for supplying water to the top of said lid tocool the same, said band having`A a plurality of openings therethroughfor the admission and exhaust of air to andy from the milk can. l

3. An aerating and cooling device for milk, assembled in a single unitand adapted to be applied to cover the topof `a milk can, said devicecomprising. a dome-shaped cap adapted to be secured in the top openingvof a milk canto overlie the same, said ca having a plurality yofopenings therein, o or the admission and exhaust of air to and from themilk can, a vertical shaft journaled in said cap and adapted to projectdownwardly therefrom into the milk of the milk can, .stirring meansmounted kon said shaft, a Water motor fixed to the top ofsaid`cap,mea1:is for Vdriving said shaft from said Water motor, an lannularcasing formed at the top central portion of thev said `cap and having apluthe can, a,

rality of circumferential openings therein, and a conduit leading fromthe exhaust port of said water motor to the interior of said casing.

4. The combination with a milk can, of an aerating and cooling devicecomprising a band adapted to fit within the top of said can and having abead adapted to bear against the top of the can, a dome shaped lidmounted on the top of said band and having edges projecting beyond thetop edge of said can, a water motor mounted on the top of said lid, ashaft journaled within said lid and extending downwardly into said can,a

stirring means carried on said shaft, means Y for driving said shaftfrom said water motor, a casing mounted on the central portion of thetop of said lid and having a series of peripheral holes therein, andmeans for supplying the exhaust water from said water motor to saidcasing to permit the same to run over the top of said lid and to drainfrom the projecting portions at the edges of said lid.

5. An aerating and cooling device for milk, comprising a cover adaptedto be attached to the top of a milk can, said cover member having a topportion adapted to overhang the upper edge of the milk can, and anannular member adapted to telescope with the upper edge of the milk can,a water motor fixed to said cover member, means for exhausting waterafter passing through said motor on the top portion of said cover, astirring shaft projecting through said cover and adapted to be disposedwithin the contents ofV said milk can, driving connections between saidstirring shaft and said motor, the annular portion of said cover memberhaving air openings therein.

6. In an aerating and cooling device for milk, a cover member adapted tobe applied to the top of a milk can comprising a dishshaped top ofslightly larger area than the diameter of a milk can and adapted tooverhang the upper end thereof, an annular member secured to said topand adapted to telescope with the upper edge of a milk can, said annularmember having air openings therein, a water motor xed to said top, achamber concentrically mounted on the top of said cover and connectedwith the exhaust of said water motor, said chamber having a series ofcircumferentially spaced outlet passages for distributing exhaust waterover said cover and about the sides of the milk can, and a stirringshaft projecting through said cover and rotatably connected thereto anddriving connections between the upper end of said shaft and said watermotor.

In testimony whereof I aiIix my signature.

RALPH B. LATTERELL.

